User manual PRESONUS MP20 (BACK)

[. . . ] Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you. In no event will PreSonus be liable for incidental, consequential or other damages resulting from the breach of any express or implied warranty, including, among other things, damage to property, damage based on inconvenience or on loss of use of the product, and, to the extent permitted by law, damages for personal injury. Some states do not allow the exclusion of limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This warranty gives you specific legal rights, and you may also have other rights, which vary form state to state. [. . . ] We urge you to scan this manual before hooking up your MP20 (BACK) (BACK) to become familiar with its features and various applications. Good luck and enjoy your MP20 (BACK) (BACK)! 4 OVERVIEW 1. 2 FEATURES The following is a summary of your MP20 (BACK) (BACK)' features: s ? FET, Class A Discrete Input Buffers. Each channel of your MP20 (BACK) (BACK) contains a Class A discrete input buffer followed by a dual servo gain stage. This provides ultra low noise and wide gain control. This allows the MP20 (BACK) (BACK) user to boost desirable signal without increasing unwanted background noise (NO capacitors!) 48 Volt Phantom Power. Each channel of the MP20 (BACK) (BACK) has 48V Phantom power available. When the Phantom power switch is engaged, power is supplied at a constant rate whether one or both channels are utilized. This assures optimum performance of your condenser microphone(s) and that it will be free of distortion associated with insufficient power. A phase reverse switch is provided on each channel. This switch enables the user to invert the phase of a microphone when phase cancellation is noted. The phase reverse switch allows the operator to avoid phase cancellation when identical microphones are used in close proximity to one another. IDSS Control selects the amount of boost (0% to 100%) applied to the even harmonic series of the signal being amplified by a channel of the MP20 (BACK) (BACK). The effect of manipulating the harmonic distortion is of increasing or decreasing the apparent " warmth"of the signal. This capability is derived from the transformer and its dual servo gain stage. This proprietary feature of PreSonus products was introduced in the PreSonus M80 Eight Channel Microphone Pre-Amplifier. Experiment with the IDSS control and see what type of sounds you can get from your present microphone selection. Phantom Power is available to each channel input of the MP20 (BACK) (BACK). The 48 volts is supplied by way of the XLR connector for condenser mics and any 9 CONTROLS & CONNECTIO NS other devices requiring continuous power through the XLR input. This power is supplied at a constant level allowing use of both inputs simultaneously for condenser mics without any degradation of audio quality. PIN 1 GND PIN 2 +48v PIN 3 +48v XLR connector wiring for Phantom Power Phase Reverse Switch allows the user to invert the polarity of the XLR connector by switching pins two and three. The inversion of the pins of the XLR connector may be necessary to alter the audio phase of two like microphones to compensate for phase cancellation. It may be required that the wiring of a cable' XLR connector be switched to successfully utilize s Phantom power. -20 dB Pad provides -20 decibels of attenuation with the push of a button. This is a very useful feature for rapidly reducing the level coming into the MP20 (BACK) (BACK) and thus preventing the input signal from over-modulating (distorting) the input. This may occur due to high output level from a microphone or line device. Padding the input serves to provide increased " headroom"for the operator. 80 Hz Filter. [. . . ] The Return / Line In connector of the MP20 (BACK) (BACK) is provided for use in conjunction with audio process devices such as compressor/limiters and as a Line In for recording media such as tape machines, hard disc recorders, or DAT' When a device is connected to this jack, the Neutrik?disconnected. TIP RING SLEEVE High Low GND (+) (-) Cable Wiring Diagram for Balanced Send / Return Jacks The Send Jack on the back panel of the MP20 (BACK) (BACK) routes the signal being processed by the channel to outboard devices or to recording media. 12 CONTROLS & CONNECTIO NS MIX OUTPUT. A pair of XLR connectors is provided for the Left and Right Outputs of the stereo summing bus. Signals are assigned to these outputs using the L/R Assign switches on the individual channels. 2. 7 POWER SUPPLY The Power Jack on your MP20 (BACK) (BACK) accepts a standard IEC cord like those found on most computers and professional recorders. [. . . ]